Bioinspired, self-powered, and highly sensitive electronic skin for sensing static and dynamic pressures

Sun, Q.-J., Zhao, X.-H., Yeung, C.-C., Tian, Q., Kong, K.-W., Wu, W., Venkatesh, S., Li, W.-J. and Roy, V. A.L. (2020) Bioinspired, self-powered, and highly sensitive electronic skin for sensing static and dynamic pressures. ACS Applied Materials and Interfaces, 12(33), pp. 37239-37247. (doi: 10.1021/acsami.0c10788) (PMID:32814376)

Abstract

Flexible piezoresistive pressure sensors obtain global research interest owing to their potential applications in healthcare, human–robot interaction, and artificial nerves. However, an additional power supply is usually required to drive the sensors, which results in increased complexity of the pressure sensing system. Despite the great efforts in pursuing self-powered pressure sensors, most of the self-powered devices can merely detect the dynamic pressure and the reliable static pressure detection is still challenging. With the help of redox-induced electricity, a bioinspired graphite/polydimethylsiloxane piezoresistive composite film acting both as the cathode and pressure sensing layer, a neoteric electronic skin sensor is presented here to detect not only the dynamic forces but also the static forces without an external power supply. Additionally, the sensor exhibits a fascinating pressure sensitivity of ∼103 kPa–1 over a broad sensing range from 0.02 to 30 kPa. Benefiting from the advanced performance of the device, various potential applications including arterial pulse monitoring, human motion detecting, and Morse code generation are successfully demonstrated. This new strategy could pave a way for the development of next-generation self-powered wearable devices.

• Item Type: Articles
• Additional Information: The authors acknowledge the grant from the Research Grant Council of HKSAR (General Research Fund grant no. CityU 11210819).
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Vellaisamy, Professor Roy
• Authors: Sun, Q.-J., Zhao, X.-H., Yeung, C.-C., Tian, Q., Kong, K.-W., Wu, W., Venkatesh, S., Li, W.-J., and Roy, V. A.L.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: ACS Applied Materials and Interfaces
• Publisher: American Chemical Society
• ISSN: 1944-8244
• ISSN (Online): 1944-8252
• Published Online: 11 August 2020
• Copyright Holders: Copyright © 2020 American Chemical Society
• First Published: First published in ACS Applied Materials and Interfaces 12(33):37239–37247
• Publisher Policy: Reproduced in accordance with the publisher copyright policy